1 Pair of trousers = one unit X two legs
1 Pair of socks = two units = two socks
1 Pair of pants = one unit X two legs
1 pair of bollocks = one unit X two bollocks
And that is what that add is a load of Bollocks, it is misleading at the very best, If you buy a Pair of headlights it should be a pair, not foccing one headlight. or at the least a double headlight unit, as in the Fazer.
Now is the Fazer classed as a One headlight bike or is it classed as a pair of headlights?
Mine had twin/two headlights, they are a pair.
Bastards, that doubles your costs. and possibly twice the postage.
Bah Humbug!